You asked:

if it's 12 pm in uk what time is it in usa

  • 12:00 p.m. in the United Kingdom is the same as 7:00 a.m. Eastern Daylight Time, 3:00 a.m. Alaska Daylight Time, 6:00 a.m. Central Daylight Time, 1:00 a.m. Hawaii-Aleutian Standard Time and 4:00 a.m. Pacific Daylight Time in the United States.
  • the United States
    the United States
    the United Kingdom
    the United Kingdom
    7:00 a.m. Eastern Daylight Time

  • 3:00 a.m. Alaska Daylight Time

  • 6:00 a.m. Central Daylight Time

  • 1:00 a.m. Hawaii-Aleutian Standard Time

  • 4:00 a.m. Pacific Daylight Time